In 1838 Maximilian Joseph travelled to Egypt and Palestine.[1] He published an account of this trip: Wanderung nach dem Orient im Jahre 1838 (München: Georg Franz, 1839; reprinted Pfaffenhofen: Ludwig, 1978). While climbing the Great Pyramid he arranged for his servants to yodel as if he were climbing in the Alps. He collected a number of antiquities which he brought back to Bavaria and displayed in his father's home, Banz Abbey; they can still be seen there today. Among the items are the mummy of a young woman, three mummies' heads, several animal mummies, shawabtis, and several stones from tombs or temples including one from the Temple of Dendur. He also bought some children in the Cairo slave market and later freed them. When Maximilian Joseph was in Jerusalem, he paid for the restoration of the Church of the Flagellation on the Via Dolorosa.

Maximilian Joseph was one of the most prominent promoters of Bavarian folk-music in the 19th century. Under his influence the zither started to be used in court circles and eventually became identified as the national musical instrument of Bavaria. Because of his interest he received the nickname Zither-Maxl. He himself played the zither and also composed music for it.

During a visit by his cousin Ludwig II of Bavaria, Ludwig saw some sheet music on Maximilian Joseph's piano by the composer Richard Wagner, which led on to Ludwig's financial support for Wagner from 1863.